Turnbuckles



May 5, 1969 R. H. DoRNB'os 3,442,000

i TURNBUCKLES I Filed March 29, 1967 AT TOKNEY United States Patent 'O"ice Patente, M;4',2;222

sides thereof is narrower or thinner than the thickness 'ruiiiiiiizorimsof the tube' h k The tubular extrusion has side edges 6 of lesser t icRusell llmmlgs Splmg IijllfelfMch'sgl to ness than the mid-portion ofthe bar, and these thinner erwllllel 1559 196c'7 SelicNlallz 45, 5 edgesform narrower ends 7 on the slugs 4. The hollow Ix'm (L Bzp 1/00'interior of the tubular extrusion is formed in the thicker U.S. Cl.29-175 6 Claims center of the bar. When the slugs 4 are cut from thebar,

this forms an elongated central opening 8 in the slugs as appears inFIGURE 2. ABSTRACT OF THE DISCLOSURE 10 In section C of FIGURE 1 thereis illustrated a boring Manufacturing steps of extruding tubular metalbar operation i Whlcil a blt 19 1S rmlmo tg? ends of ige stock ofgreater width than thickness and having edges slugs formmg alined Ohas 1fclplll mt uloln 13 of reduced thickness, with an internal bore ofrectangular amount and type of mac mely aval a. e Ofes h cross sectionin the thicker portion of the tube; cutting may be formed Successlvely mOpposlte en s o eac lug or simultaneously in opposite ends of each slug.the tube transversely lnto slugs of lesser width than the s thickness ofthe tube, boring alined holes into the ends The holes 10 may also beformed m the extruded bar of the slugs through narrower ends formed fromthe rebefoie the slugs are. Separated. by the Saw 52 The use. of ducededges and into the ends of the oblong Opening multiple head drillingmachlnes for formlng multiple formed by the extrusion; and tapping theholes with oppobores 10 m one or both sldes of the bar 3 may also be 2Ofeasible. Sltely pitched threads at Opposlte ends of the slugs' Insection D of FIGURE l there is conventionally illustrated a tappingoperation in which a tap 11 is run into the bores 10 to form threads 12.As in the case of the bores 10, the taps 11 may be multiplied, and the Abef 0f tubular metal 0f Uniform density and Sflel'lgh 25 operation maybe performed on the bar stock 3 before Outline of the invention isformed by extrusion. The bar is wider than it is thick the separation ofthe slugs. However, the tapping tools and has side edges of reducedthickness. The hollow inused on opposite ends of the slugs orsides ofthe bar are terior of the tube is of rectangular 'cross sectiondisoppositely pitched to form oppositely, pitched threads 12A posed inthe thicker portion of the tube. The tube is cut and 12B. In order todistinguish the right hand thread transversely into slugs of lesserwidth than the thickness from the left hand thread, one side of theextrusion is of the tube, and holes are drilled and tapped throughformed with grooves on both sides that leave indentifythe ends of theslugs into the ends of the openings formed ing notches 13 in the edgesof one end of the slug. by the interior of the tube, with the threads atthe oppo- In the slug or turnbuckle body 4 shown in FIGURE 2, site endsof the slugs being oppositely pitched to receive the inner opening 8 isgenerally rectangular with flat opthe threaded eIldS 0f the eye-bolts 0fa turnbuckle De- 35 posed ends 14. The usual eye-bolts are receiveableinto Sfably, the thickness 0f the tubular extrusion tS Within thethreaded bores as is indicated by the dotted lines at 1S.

one Standard SiZe 0f Wrench, and the 'Width 0f the slugs Desira-bly thethickness of the extrusion which determines measured between the Cutsfrom the tube tS Within the width of the slug 4 is sized to t within onesize of another standard wrench of smaller size than the wrench standardwrench, while the thickness of the slugs bewhich ts the thickness of thetube. tween their cut faces lits within a smaller size of stand- 'Ihedrawings, of which there is one sheet, illustrate ard wrench. a highlypractical way of performing the steps of the The cross sectional shapeof the extruded bar and the manufacturing process. corresponding shapeof the turnbuckle body is not lim- FIGURE 1 is an elevational view,conventionally illusited to the rst shape illustrated. FIGURE 5illustrates a trating the steps of the method of manufacture. modifiedbody 4B lwith a generally elliptical outer con- FIGURE 2 is a sideelevationalvew of the turnbuckle tour 16 and an elliptical inner opening17. Tapped holes body formed by the method, with one eye-bolt shown 12are formed through the somewhat flattened ends 7B in assembled positionin dotted lines. and recive the eye-bolts as in the first form of thebody. FIGURE 3 is an edge elevational view of the body An identifyingnotch 13B is formed in one end of the in FIGURE 2. body by a grooveformed in the edge of the extruded FIGURE 4 is an end elevational Viewof the body in bar from which the modified body is cut. The modifiedFIGURES 3 and 4. body has a certain advantage in that its ellipticalshape FIGURE Sis a side elevational view of amodied form provides a widerange of widths to which wrenches of of turnbuckle body formed from anextrusion of modidifferent sizes may be applied. lied cross section.What is claimed as new is:

The section A of FIGURE l conventionally illustrates 1 The met h0d 0fmanufaeturng bodies fOI 'fufllbuekles an extrusion press 1 having aforming die 2. The press Which CQmPl'lSeS the Steps 0f i is adapted toextrude metal, and the die is designed to extfudmg .a tubular bal' 0fmetelhaVlUg greater Wldf h shape the metal into tubular stock, as themetal is dethan thlckness and having an Inner opemng that 1s wider thanit is thick,

cutting the bar so extruded transversely of its length to form slugswith parallel sides and of lesser thickness between said sides than thethickness of said bar, boring alined holes through the ends of saidslugs into openings formed therethrough by the inner opening in saidbar,

livered in solidified bar form at 3 with the metal uniformly compactedby the pressure of the extrusion process. Such metal extruding machinesare well known so the press and its operation are not described ingreater detail. The extruded metal and the bar formed thereby may bealuminum or of other metals or alloys, capable 0f being extruded as isdesiredand tapping the bores with the threads formed -at oppo- Secton Bof FIGURE 1 conventionally illustrates an site ends of the slugs ,beingoppositsly pitched' Operation 0f Cutting Separate slugs 0I' bodies 4 0fmetal 4 2. The method as dened in claim 1 in which said bar from the end0f the bal 3, by means Such as the SaW 5 70 is formed with transverselyopposite side portions that are The tubular bar is of greater width thanthickness, and thinner than the transverse center of the bar, 4and whichlength or Width of the slugs measured kbetween the cut form narrowedends on said slugs.

3. The method as defined in claim 1 in which the side surfaces of saidbar as extruded are flat and parallel and perpendicular to alongitudinal plane passed transversely through said bar to form at endson said slugs through which said bores are formed.

4. The method as defined in claim 1 in which said bar is extruded with alongitudinal groove in its surface adjacent one side edge thereof toform a distinguishing notch in one end of said slugs.

5. The method as defined in claim 1 in which the wider sides of saidtube as extruded have central portions that are at and parallel,

the corresponding sides of the opening in said tube also being flat andparallel.

6. The method as defined in claim 1 in which the cross section of saidtube along the plane of the cut off sides of said slugs is generallyelliptical and thicker in the center.

References Cited UNITED STATES PATENTS JOHN F. CAMPBELL, PrimaryExaminer.

D. C. REILEY, Assistarut Examiner.

